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An f/2.95 CCD camera has a 109 mm focal length lens and can focus on objects...

An f/2.95 CCD camera has a 109 mm focal length lens and can focus on objects from infinity to as near as 35.0 cm from the lens. Note: "f/2.95" means "an f-number of 2.95."

HINT

(a)

Determine the camera's aperture diameter in mm.

mm

Determine the minimum and maximum distances in cm from the CCD sensor over which the lens must be able to travel during focusing.

(b)

minimum

cm

(c)

maximum

cm

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Answer #1

(a) As N= { Where, f = focal length = 109mm A = aperture diameter N = f-number " 109 = 36.95mm + f = 109mm = 10.9cm, u = -35cm L V = 8.3cm Hence minimum distance = 8.3cm

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